EP1500445A2 - Large metal mould - Google Patents

Large metal mould Download PDF

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Publication number
EP1500445A2
EP1500445A2 EP04291855A EP04291855A EP1500445A2 EP 1500445 A2 EP1500445 A2 EP 1500445A2 EP 04291855 A EP04291855 A EP 04291855A EP 04291855 A EP04291855 A EP 04291855A EP 1500445 A2 EP1500445 A2 EP 1500445A2
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EP
European Patent Office
Prior art keywords
mold
channels
face
block
channel
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EP04291855A
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German (de)
French (fr)
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EP1500445A3 (en
Inventor
Bruno Bellouard
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Alpha 3D
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Alpha 3D
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Publication date
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Publication of EP1500445A2 publication Critical patent/EP1500445A2/en
Publication of EP1500445A3 publication Critical patent/EP1500445A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2218—Cooling or heating equipment for dies

Definitions

  • the present invention relates to a large-sized metal mold, in particular an injection mold, of the type consisting of at least two parts of mold able to be moved closer together and separated from each other, generally by via a press to form, in the closed position of the mold, a molding cavity, each mold part, having a molding face and an opposite face, said press support face, and being provided with channels serving, for at least a part of them, to the circulation of a fluid coolant.
  • the mold may be in the form of a block having cavities.
  • these cavities to allow resistance of the mold during the execution of the molding operations, must be filled with material, such only ceramics.
  • the cooling channels of these molds are of conventional arrangement, that is to say that they extend perpendicularly to the opening / closing axis of the mold.
  • these channels are realized in the ceramic part and can be made by means of insert in the ceramic material or by machining. This again results in a waste of time important.
  • An object of the present invention is therefore to propose a mold which combines the manufacturing facilities for molds made in the form of a casting part while offering sufficient mechanical strength to allow the realization of large injection metal mold.
  • Another object of the present invention is to propose a mold whose Channel design optimizes the cooling of such a mold.
  • the subject of the invention is a large-sized metal mold, in particular injection mold, of the type consisting of at least two parts of mold able to be moved closer together and separated from each other, generally by via a press to form, in the closed position of the mold, a molding cavity, each mold part, being a casting part affecting the shape of a block, having a molding face and a face opposite, said support face of the press, and being provided with channels serving, for at least part of them, to the circulation of a coolant, said inner channels being integrally molded with said block, characterized in that what said molded channels with said block are oriented in the mold opening / closing direction and form a network of channels, parallel to the axis of opening / closing of the mold to allow the walls of channels to cash out the efforts resulting from the molding operations.
  • At least part of the channels fulfill a dual function namely of a part, at the level of the walls, a function of encashment of the efforts resulting injection pressures implemented, on the other hand, at the level of the interior said channels, the role of fluid flow conduit.
  • the organization of channels in the form of a network of parallel channels allows, using a end of each of the channels, to follow the profile of the molding face and therefore to obtain the same characteristics in terms of heat exchange as those that were obtained when a single channel followed the profile of the face of molding.
  • the metal mold, object of the invention is more particularly intended to constitute a mold of large size, in particularly an injection mold.
  • This mold is constituted, in a conventional manner, of at least two mold parts 1 adapted to be brought together and spaced apart one on the other hand usually through a press to form, in closed position of the mold, a mold cavity.
  • each mold part 1 comprises a molding face 2 and a Opposite face 3, called the support face of the press.
  • This mold part is still provided with channels 4 serving, for at least part of them, to the circulation of a coolant.
  • Each mold part 1 is a piece of foundry affecting the general shape of a block with internal 4 channels molding with said block.
  • these channels form a network of channels parallel to the axis of opening / closing of the mold and are oriented in the S direction of opening / closing of the mold for allow the channel walls 4 to collect the forces resulting from the molding operations.
  • the realization of the channels in the form of a network leads to a multiplication of the channels thus allowing one end of this multiplicity of channels to follow the molding face to facilitate the heat exchange between molding cavity and channels thus obtaining an effect equivalent to that which would be obtained by a channel following the profile of the face of molding extending substantially parallel to the latter.
  • the channels 4 form a network of channels parallel to the axis of opening / closing of the mold, these channels taking birth behind the molding side 2.
  • Channels 4 of the network of channels extend to the rear of the support surface 3 of the mold. This solution makes it possible to obtain sealed channels at the time of manufacture of the block intended to constitute the mold part 1. This results in a simplification moment of connection of all the networks to a heat transfer fluid. he then just connect the input 7 and the output 8 of the block to a circuit heat transfer fluid supply to allow feeding of all or part of the channels 4 of the mold without having to manage the sealing problems at the within the mold.
  • the channels 4 form again a network of channels parallel to the axis opening / closing the mold. These channels 4 are born backwards of the molding face 2 and open into the support face 3 of the block. he then becomes necessary to close this block support face via an insert plate whose waterproof connection to the block must be ensured.
  • the channel walls are provided with fluid circulation openings 5 of a channel 4 to another.
  • the channel walls are provided with fluid circulation openings 5 of a channel 4 to another.
  • at least a part 4 channels is compartmentalized through a partition 6 reported.
  • Said channels 4 then comprise, at their wall opening into the support face of the block, notches. These notches form, in the closed state of block by means of a solid wall attached, the openings 5 of circulation of fluid from one channel 4 to another, so as to impose a forced circulation of the flow of fluid along the walls of said compartmentalized channels. It results in this case an ease of manufacture of the openings of the channels.
  • the ends of the channels 4 back of the molding face are positioned along a line whose plot is identical to the profile of the molding face 2 of the mold. So, this solution allows optimized thermal exchanges at the level of the face 2 of because the multiplicity of channels resulting from their organization in network allows to cover, with the help of the end of these channels, a large part of the surface extending under the molding face.
  • the channels 4 present a polygonal section.
  • the block channels have a honeycomb structure formed here by hexagonal cells.
  • the channels thus form a network of channels adjacent parallels, preferably contiguous, of axis parallel to the aperture axis of the mold and whose ends cooperate to follow the profile of the face molding.
  • the interest of the polygonal sections being to have walls of constant thickness limiting the problems of bubbling, shrinking and distortion at the time of the mold manufacturing.
  • Such a mold is manufactured in a conventional manner according to the techniques of Foundry well known to those versed in this art.
  • the stages of process comprise a first step of manufacturing a model of the part 1 mold made of a fusible material, such as polystyrene.
  • the elements hollow of this mold are then filled with sand and the whole is soaked in sand to make a sand mold.
  • the initial model is a model lost during the operation of metal casting that comes to replace the parts occupied by the master model.
  • the sand is then removed and the mold metal, obtained by casting, constitutes the definitive mold.
  • This technique does not will not be described in more detail because it is well known to those versed in this art.
  • the metal used during the casting may be aluminum, steel or other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The mould, especially for the production of components by injection moulding, has two sections (1) that are brought together to form a moulding cavity and moved apart to allow removal of the moulded component. Each section has a moulding face (2), a thrust face (3) for the mould press, and inner channels (4) for circulating a liquid coolant. The cooling channels lie parallel to the direction (S) of the mould sections' travel during opening and closing, so that the channel walls take up the forces resulting from the moulding operations. The channels are moulded during the manufacture of the mould sections and end short of the moulding and thrust faces; they are polygonal in section, e.g. forming a honeycomb structure.

Description

La présente invention concerne un moule métallique de grande dimension, en particulier un moule d'injection, du type constitué d'au moins deux parties de moule aptes à être rapprochées et écartées l'une de l'autre, généralement par l'intermédiaire d'une presse pour former, en position fermée du moule, une cavité de moulage, chaque partie de moule, comportant une face de moulage et une face opposée, dite face d'appui de la presse, et étant munie de canaux servant, pour au moins une partie d'entre eux, à la circulation d'un fluide caloporteur.The present invention relates to a large-sized metal mold, in particular an injection mold, of the type consisting of at least two parts of mold able to be moved closer together and separated from each other, generally by via a press to form, in the closed position of the mold, a molding cavity, each mold part, having a molding face and an opposite face, said press support face, and being provided with channels serving, for at least a part of them, to the circulation of a fluid coolant.

Les moules métalliques d'injection de grande dimension sont aujourd'hui fabriqués par usinage d'un bloc métal. Il en résulte un grand nombre d'inconvénients, à savoir un temps de fabrication et un poids importants et un prix élevé.Large size metal injection molds are today manufactured by machining a metal block. This results in a large number disadvantages, namely a significant manufacturing time and weight and a high price.

Pour des moules de petite dimension, d'autres techniques de fabrication sont connues. On connaít par exemple les techniques de fabrication de moule par frittage de poudre métallique et par stéréo-lithographie comme l'illustre en particulier le brevet US-A-6.331.267 ou la demande de brevet WO 97/16274. Dans ce cas, le moule peut se présenter sous forme d'un bloc présentant des cavités. Toutefois, ces cavités, pour permettre une résistance du moule lors de la réalisation des opérations de moulage, doivent être remplies de matière, telle que de la céramique. Par ailleurs, les canaux de refroidissement de ces moules sont de disposition classique, c'est-à-dire qu'ils s'étendent perpendiculairement à l'axe d'ouverture/fermeture du moule. Enfin, ces canaux sont réalisés dans la partie céramique rapportée et peuvent être réalisés au moyen d'insert dans la matière céramique ou par usinage. Il en résulte à nouveau une perte de temps importante. L'inconvénient majeur d'un tel moule résulte du fait qu'il est fabriqué en résine. Il est incapable de résister à des pressions d'injection élevées. En conséquence, une telle technologie n'est pas transposable à des moules de grande dimension où les pressions d'injection mises en oeuvre ne sont pas comparables. Ces deux caractéristiques, à savoir un procédé de fabrication de chaque partie de moule par dépôt successif de strates et l'incorporation de pièces pour ménager les conduits de refroidissement, sont reprises dans la demande WO 97/16274 où chaque figure illustre une configuration classique des conduits dans laquelle ces derniers s'étendent sensiblement parallèlement à la face de moulage pour être au plus près de cette surface (page 11 - lignes 31 à 36) afin d'éviter un différentiel de température. Cette même fabrication par frittage de poudre métallique et/ou par stéréo-lithographie est reprise dans le brevet DE 19937315. Elle amène le concepteur à une disposition classique du conduit de refroidissement qui, à nouveau, suit le profil de la face de moulage en s'étendant sensiblement parallèlement à cette dernière pour les mêmes raisons que celles mentionnées ci-dessus dans la demande WO 97/16274 et en raison du procédé de fabrication retenu.For small molds, other manufacturing techniques are known. We know for example the techniques of mold making by sintering of metallic powder and stereo-lithography as illustrated in particularly US-A-6,331,267 or the patent application WO 97/16274. In this case, the mold may be in the form of a block having cavities. However, these cavities, to allow resistance of the mold during the execution of the molding operations, must be filled with material, such only ceramics. Moreover, the cooling channels of these molds are of conventional arrangement, that is to say that they extend perpendicularly to the opening / closing axis of the mold. Finally, these channels are realized in the ceramic part and can be made by means of insert in the ceramic material or by machining. This again results in a waste of time important. The major disadvantage of such a mold results from the fact that it is manufactured in resin. It is unable to withstand high injection pressures. In Consequently, such technology can not be transposed to large dimension where the injection pressures used are not comparable. These two characteristics, namely a manufacturing process of each mold part by successive deposition of strata and the incorporation of spare parts for the cooling ducts, are included in the WO 97/16274 application wherein each figure illustrates a conventional configuration ducts in which these extend substantially parallel to the molding face to be closer to this surface (page 11 - lines 31 to 36) to avoid a temperature differential. This same manufacture by sintering of metal powder and / or stereolithography is incorporated in Patent DE 19937315. It brings the designer to a conventional arrangement of the cooling duct which, again, follows the profile of the molding face extending substantially parallel to the latter for the same reasons mentioned above in the application WO 97/16274 and because of the selected manufacturing process.

On connaít par ailleurs, comme l'illustre en particulier le brevet allemand DE-A-10017391, un procédé de fabrication de moule par fonderie. Dans ce document, les canaux servant au refroidissement de la cavité de moulage sont alors moulés d'une seule pièce avec la pièce de moule elle-même. Toutefois du fait de l'orientation conférée aux canaux qui suivent la cavité de moulage et s'étendent sensiblement parallèlement à la face de moulage, il en résulte un risque d'effondrement du moule et d'absence de résistance de ce moule aux efforts résultant de l'injection de la matière dans la cavité de moulage. En conséquence, une telle réalisation n'est pas transposable à la fabrication de moule d'injection de grande dimension. En effet, dans la plupart des moules de l'état de la technique, les canaux de refroidissement, qui sont fabriqués par usinage dans le moule, s'étendent parallèlement à la face de moulage et donc sensiblement perpendiculairement au sens d'ouverture/fermeture du moule. Si l'on peut rencontrer parfois des canaux s'étendant sensiblement parallèlement à l'axe d'ouverture/fermeture du moule, ils s'appliquent dans ce cas à des moules métalliques de petite dimension fabriqués par usinage. Ils comportent alors les inconvénients inhérents à la technique de fabrication par usinage.Also known, as illustrated in particular by German Patent DE-A-10017391, a mold making process by casting. In this document, the channels used to cool the mold cavity are then molded in one piece with the mold piece itself. However, made of the guidance imparted to the channels that follow the molding cavity and extending substantially parallel to the molding face, this results in a risk of collapse of the mold and the lack of resistance of this mold to efforts resulting from the injection of the material into the molding cavity. In Consequently, such an implementation can not be transposed to the manufacture of large injection mold. Indeed, in most molds the state of the art, the cooling channels, which are manufactured by machining in the mold, extend parallel to the molding face and therefore substantially perpendicular to the opening / closing direction of the mold. Yes we can sometimes meet channels extending substantially parallel to the axis of opening / closing of the mold, they apply in this case to small size metal molds made by machining. They include then the disadvantages inherent in the manufacturing technique by machining.

Un but de la présente invention est donc de proposer un moule qui allie les facilités de fabrication des moules réalisés sous forme de pièce de fonderie tout en offrant une résistance mécanique suffisante pour pouvoir permettre la réalisation de moule métallique d'injection de grande dimension.An object of the present invention is therefore to propose a mold which combines the manufacturing facilities for molds made in the form of a casting part while offering sufficient mechanical strength to allow the realization of large injection metal mold.

Un autre but de la présente invention est de proposer un moule dont la conception des canaux permet d'optimiser le refroidissement d'un tel moule.Another object of the present invention is to propose a mold whose Channel design optimizes the cooling of such a mold.

A cet effet, l'invention a pour objet un moule métallique de grande dimension, en particulier moule d'injection, du type constitué d'au moins deux parties de moule aptes à être rapprochées et écartées l'une de l'autre, généralement par l'intermédiaire d'une presse pour former, en position fermée du moule, une cavité de moulage, chaque partie de moule, étant une pièce de fonderie affectant la forme d'un bloc, comportant une face de moulage et une face opposée, dite face d'appui de la presse, et étant munie de canaux servant, pour au moins une partie d'entre eux, à la circulation d'un fluide caloporteur, lesdits canaux internes étant venus de moulage avec ledit bloc, caractérisé en ce que lesdits canaux venus de moulage avec ledit bloc sont orientés dans le sens d'ouverture/fermeture de moule et forment un réseau de canaux, parallèles à l'axe d'ouverture/fermeture du moule pour permettre aux parois de canaux d'encaisser les efforts résultant des opérations de moulage.For this purpose, the subject of the invention is a large-sized metal mold, in particular injection mold, of the type consisting of at least two parts of mold able to be moved closer together and separated from each other, generally by via a press to form, in the closed position of the mold, a molding cavity, each mold part, being a casting part affecting the shape of a block, having a molding face and a face opposite, said support face of the press, and being provided with channels serving, for at least part of them, to the circulation of a coolant, said inner channels being integrally molded with said block, characterized in that what said molded channels with said block are oriented in the mold opening / closing direction and form a network of channels, parallel to the axis of opening / closing of the mold to allow the walls of channels to cash out the efforts resulting from the molding operations.

Au moins une partie des canaux remplissent une double fonction à savoir d'une part, au niveau des parois, une fonction d'encaissement des efforts résultant des pressions d'injection mises en oeuvre, d'autre part, au niveau de l'intérieur desdits canaux, le rôle de conduit de circulation de fluide. L'organisation des canaux sous forme d'un réseau de canaux parallèles permet, à l'aide d'une extrémité de chacun des canaux, de suivre le profil de la face de moulage et donc d'obtenir les mêmes caractéristiques en terme d'échanges de chaleur que celles qui étaient obtenues lorsqu'un canal unique suivait le profil de la face de moulage. Le demandeur a donc constaté que, de manière surprenante, la mise en place d'un réseau de canaux parallèles entre eux et au sens d'ouverture/fermeture du moule avec des extrémités de canaux suivant ainsi le profil de la face de moulage permet d'obtenir, en terme de refroidissement, des résultats équivalents à ceux obtenus avec un canal unique suivant le profil de la face de moulage mais à pour effet supplémentaire de renforcer la résistance mécanique du moule autorisant ainsi la réalisation d'un moule de grande dimension, en particulier un moule d'injection sous forme d'une pièce de fonderie.At least part of the channels fulfill a dual function namely of a part, at the level of the walls, a function of encashment of the efforts resulting injection pressures implemented, on the other hand, at the level of the interior said channels, the role of fluid flow conduit. The organization of channels in the form of a network of parallel channels allows, using a end of each of the channels, to follow the profile of the molding face and therefore to obtain the same characteristics in terms of heat exchange as those that were obtained when a single channel followed the profile of the face of molding. The applicant has therefore found that, surprisingly, the in place of a network of parallel channels between them and in the sense opening / closing the mold with channel ends thus following the profile of the molding face makes it possible to obtain, in terms of cooling, results equivalent to those obtained with a single channel following the profile of the molding face but for the added effect of strengthening the resistance mechanical mold allowing the realization of a mold of great dimension, in particular an injection mold in the form of a piece of foundry.

L'invention sera bien comprise à la lecture de la description suivante d'exemples de réalisation, en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue en coupe d'un moule dans un mode de réalisation conforme à l'invention ;
  • la figure 2 représente une vue en coupe d'un autre mode de réalisation d'un moule conforme à l'invention ;
  • la figure 3 représente une vue en perspective ¾ avant de la face d'appui d'un moule conforme à l'invention dans lequel les canaux ont été réalisés sous forme d'éléments débouchant et
  • la figure 4 représente une vue en coupe d'un autre mode de réalisation d'un moule conforme à l'invention.
    • The invention will be better understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:
  • Figure 1 shows a sectional view of a mold in an embodiment according to the invention;
  • Figure 2 shows a sectional view of another embodiment of a mold according to the invention;
  • FIG. 3 represents a perspective view ¾ before the bearing face of a mold according to the invention in which the channels have been made in the form of elements opening and
  • Figure 4 shows a sectional view of another embodiment of a mold according to the invention.

    • Comme mentionné ci-dessus, le moule métallique, objet de l'invention, est plus particulièrement destiné à constituer un moule de grande dimension, en particulier un moule d'injection. Ce moule est constitué, de manière classique, d'au moins deux parties 1 de moule aptes à être rapprochées et écartées l'une de l'autre généralement par l'intermédiaire d'une presse pour former, en position fermée du moule, une cavité de moulage. Dans les exemples représentés, chaque partie 1 de moule comporte une face 2 de moulage et une face 3 opposée, dite face d'appui de la presse. Cette partie de moule est encore munie de canaux 4 servant, pour au moins une partie d'entre eux, à la circulation d'un fluide caloporteur. Chaque partie 1 de moule est une pièce de fonderie affectant la forme générale d'un bloc muni de canaux 4 internes venus de moulage avec ledit bloc. De manière caractéristique à l'invention, ces canaux forment un réseau de canaux parallèles à l'axe d'ouverture/fermeture du moule et sont orientés dans le sens S d'ouverture/fermeture du moule pour permettre aux parois de canaux 4 d'encaisser les efforts résultant des opérations de moulage. La réalisation des canaux sous forme d'un réseau amène à une multiplication des canaux permettant ainsi à une extrémité de cette multiplicité de canaux de suivre la face de moulage pour faciliter les échanges thermiques entre cavité de moulage et canaux obtenant ainsi un effet équivalent à celui qui serait obtenu par un canal suivant le profil de la face de moulage en s'étendant sensiblement parallèlement à cette dernière. Dans l'exemple représenté à la figure 1, les canaux 4 forment un réseau de canaux parallèles à l'axe d'ouverture/fermeture du moule, ces canaux prenant naissance en arrière de la face 2 de moulage. Les canaux 4 du réseau de canaux s'étendent jusqu'en arrière de la face 3 d'appui du moule. Cette solution permet d'obtenir des canaux étanches au moment de la fabrication du bloc destiné à constituer la partie 1 de moule. Il en résulte une simplification au moment du raccordement de l'ensemble des réseaux à un fluide caloporteur. Il suffit alors de raccorder l'entrée 7 et la sortie 8 du bloc à un circuit d'alimentation en fluide caloporteur pour permettre l'alimentation de tout ou partie des canaux 4 du moule sans avoir à gérer les problèmes d'étanchéité au sein du moule.As mentioned above, the metal mold, object of the invention, is more particularly intended to constitute a mold of large size, in particularly an injection mold. This mold is constituted, in a conventional manner, of at least two mold parts 1 adapted to be brought together and spaced apart one on the other hand usually through a press to form, in closed position of the mold, a mold cavity. In the examples each mold part 1 comprises a molding face 2 and a Opposite face 3, called the support face of the press. This mold part is still provided with channels 4 serving, for at least part of them, to the circulation of a coolant. Each mold part 1 is a piece of foundry affecting the general shape of a block with internal 4 channels molding with said block. Characteristically to the invention, these channels form a network of channels parallel to the axis of opening / closing of the mold and are oriented in the S direction of opening / closing of the mold for allow the channel walls 4 to collect the forces resulting from the molding operations. The realization of the channels in the form of a network leads to a multiplication of the channels thus allowing one end of this multiplicity of channels to follow the molding face to facilitate the heat exchange between molding cavity and channels thus obtaining an effect equivalent to that which would be obtained by a channel following the profile of the face of molding extending substantially parallel to the latter. In the example shown in FIG. 1, the channels 4 form a network of channels parallel to the axis of opening / closing of the mold, these channels taking birth behind the molding side 2. Channels 4 of the network of channels extend to the rear of the support surface 3 of the mold. This solution makes it possible to obtain sealed channels at the time of manufacture of the block intended to constitute the mold part 1. This results in a simplification moment of connection of all the networks to a heat transfer fluid. he then just connect the input 7 and the output 8 of the block to a circuit heat transfer fluid supply to allow feeding of all or part of the channels 4 of the mold without having to manage the sealing problems at the within the mold.

    Dans un autre mode de réalisation représenté à la figure 2, les canaux 4 forment à nouveau un réseau de canaux parallèles à l'axe d'ouverture/fermeture du moule. Ces canaux 4 prennent naissance en arrière de la face 2 de moulage et débouchent dans la face 3 d'appui du bloc. Il devient alors nécessaire de fermer cette face d'appui du bloc par l'intermédiaire d'une plaque rapportée dont la liaison étanche au bloc devra être assurée.In another embodiment shown in FIG. 2, the channels 4 form again a network of channels parallel to the axis opening / closing the mold. These channels 4 are born backwards of the molding face 2 and open into the support face 3 of the block. he then becomes necessary to close this block support face via an insert plate whose waterproof connection to the block must be ensured.

    Indépendamment du mode de réalisation de la face 3 d'appui et des canaux 4, les parois de canaux sont munies d'ouvertures 5 de circulation de fluide d'un canal 4 à un autre. Dans l'exemple représenté à la figure 2, au moins une partie des canaux 4 est compartimentée par l'intermédiaire d'une cloison 6 rapportée. Regardless of the embodiment of the support face 3 and the channels 4, the channel walls are provided with fluid circulation openings 5 of a channel 4 to another. In the example shown in Figure 2, at least a part 4 channels is compartmentalized through a partition 6 reported.

    Lesdits canaux 4 comportent alors, au niveau de leur paroi débouchant dans la face d'appui du bloc, des encoches. Ces encoches forment, à l'état fermé du bloc au moyen d'une paroi pleine rapportée, les ouvertures 5 de circulation de fluide d'un canal 4 à un autre, de manière à imposer une circulation forcée du flux de fluide le long des parois desdits canaux compartimentés. Il en résulte dans ce cas une facilité de fabrication des ouvertures des canaux. On note que, quel que soit le mode de réalisation retenu, les extrémités des canaux 4 en arrière de la face de moulage sont positionnés le long d'une ligne dont le tracé est identique au profil de la face 2 de moulage du moule. Ainsi, cette solution permet des échanges thermiques optimisés au niveau de la face 2 de moulage puisque la multiplicité des canaux résultant de leur organisation en réseau permet de couvrir, à l'aide de l'extrémité de ces canaux, une grande partie de la surface s'étendant sous la face de moulage.Said channels 4 then comprise, at their wall opening into the support face of the block, notches. These notches form, in the closed state of block by means of a solid wall attached, the openings 5 of circulation of fluid from one channel 4 to another, so as to impose a forced circulation of the flow of fluid along the walls of said compartmentalized channels. It results in this case an ease of manufacture of the openings of the channels. We notice that, whatever the embodiment chosen, the ends of the channels 4 back of the molding face are positioned along a line whose plot is identical to the profile of the molding face 2 of the mold. So, this solution allows optimized thermal exchanges at the level of the face 2 of because the multiplicity of channels resulting from their organization in network allows to cover, with the help of the end of these channels, a large part of the surface extending under the molding face.

    Selon un mode de réalisation préféré de l'invention, les canaux 4 présentent une section polygonale. Ainsi, comme l'illustre la figure 3, de préférence les canaux du bloc présentent une structure en nid d'abeille formée ici par des alvéoles de type hexagonal. Les canaux forment ainsi un réseau de canaux parallèles adjacents, de préférence contigus, d'axe parallèle à l'axe d'ouverture du moule et dont les extrémités coopèrent pour venir suivre le profil de la face de moulage. Bien évidemment, d'autres modes de réalisation et en particulier d'autres formes de réalisation de canaux peuvent être envisagés, l'intérêt des sections polygonales étant de disposer de parois d'épaisseur constante limitant les problèmes de bullage, de retassures et de déformation au moment de la fabrication du moule.According to a preferred embodiment of the invention, the channels 4 present a polygonal section. Thus, as illustrated in Figure 3, preferably the block channels have a honeycomb structure formed here by hexagonal cells. The channels thus form a network of channels adjacent parallels, preferably contiguous, of axis parallel to the aperture axis of the mold and whose ends cooperate to follow the profile of the face molding. Of course, other embodiments and in particular other embodiments of channels may be envisaged, the interest of the polygonal sections being to have walls of constant thickness limiting the problems of bubbling, shrinking and distortion at the time of the mold manufacturing.

    Un tel moule est fabriqué de manière classique suivant les techniques de fonderie bien connues à ceux versés dans cet art. A cet effet, les étapes du procédé comportent une première étape de fabrication d'un modèle de la partie 1 de moule réalisé en un matériau fusible, tel que du polystyrène. Les éléments creux de ce moule sont alors remplis de sable et l'ensemble est trempé dans du sable pour réaliser un moule en sable. Le modèle initial constitue un modèle perdu lors de l'opération du coulage de métal qui vient se substituer aux parties occupées par le modèle maítre. Le sable est alors éliminé et le moule métallique, obtenu par coulée, constitue le moule définitif. Cette technique ne sera pas décrite plus en détail car elle est bien connue à ceux versés dans cet art. Le métal utilisé lors de la coulée peut être de l'aluminium, de l'acier ou autre.Such a mold is manufactured in a conventional manner according to the techniques of Foundry well known to those versed in this art. For this purpose, the stages of process comprise a first step of manufacturing a model of the part 1 mold made of a fusible material, such as polystyrene. The elements hollow of this mold are then filled with sand and the whole is soaked in sand to make a sand mold. The initial model is a model lost during the operation of metal casting that comes to replace the parts occupied by the master model. The sand is then removed and the mold metal, obtained by casting, constitutes the definitive mold. This technique does not will not be described in more detail because it is well known to those versed in this art. The metal used during the casting may be aluminum, steel or other.

    Claims (10)

    Moule métallique de grande dimension, en particulier moule d'injection, du type constitué d'au moins deux parties de moule aptes à être rapprochées et écartées l'une de l'autre, généralement par l'intermédiaire d'une presse pour former, en position fermée du moule, une cavité de moulage, chaque partie (1) de moule, étant une pièce de fonderie affectant la forme d'un bloc, comportant une face (2) de moulage et une face (3) opposée, dite face d'appui de la presse, et étant munie de canaux (4) servant, pour au moins une partie d'entre eux, à la circulation d'un fluide caloporteur, lesdits canaux (4) internes étant venus de moulage avec ledit bloc,
    caractérisé en ce que lesdits canaux (4) venus de moulage avec ledit bloc sont orientés dans le sens (S) d'ouverture/fermeture de moule et forment un réseau de canaux, parallèles à l'axe d'ouverture/fermeture du moule pour permettre aux parois de canaux (4) d'encaisser les efforts résultant des opérations de moulage.    A large-sized metal mold, in particular an injection mold, of the type consisting of at least two mold parts capable of being brought together and spaced apart from each other, generally by means of a press to form, in the closed position of the mold, a mold cavity, each mold part (1), being a block-like casting having a molding face (2) and an opposing face (3), said face pressing the press, and being provided with channels (4) serving, for at least a portion of them, to the circulation of a coolant, said internal channels (4) being integrally molded with said block,
    characterized in that said channels (4) integrally molded with said block are oriented in the mold opening / closing direction (S) and form a network of channels, parallel to the opening / closing axis of the mold for allowing the channel walls (4) to absorb the forces resulting from the molding operations.         Moule selon la revendication 1,
    caractérisé en ce que les canaux (4) du réseau de canaux, venus de moulage avec le bloc, prennent naissance en arrière de la face (2) de moulage    Mold according to claim 1,
    characterized in that the channels (4) of the channel network, integrally molded with the block, originate behind the molding face (2)         Moule selon la revendication 2,
    caractérisé en ce que les canaux (4) du réseau de canaux sont des canaux (4) non débouchant qui s'étendent jusqu'en arrière de la face (3) d'appui du moule.    Mold according to claim 2,
    characterized in that the channels (4) of the channel array are non-emerging channels (4) extending to the rear of the mold support face (3).         Moule selon la revendication 2,
    caractérisé en ce que les canaux (4) du réseau de canaux débouchent dans la face (3) d'appui du bloc.    Mold according to claim 2,
    characterized in that the channels (4) of the channel network open into the support face (3) of the block.         Moule selon l'une des revendications 1 à 4,
    caractérisé en ce que les canaux (4) présentent une section polygonale.    Mold according to one of Claims 1 to 4,
    characterized in that the channels (4) have a polygonal section.         Moule selon l'une des revendications 1 à 5,
    caractérisé en ce que les canaux du bloc présentent une structure en nid d'abeille.    Mold according to one of claims 1 to 5,
    characterized in that the channels of the block have a honeycomb structure.         Moule selon l'une des revendications 1 à 6,
    caractérisé en ce que les parois de canaux sont munies d'ouvertures (5) de circulation de fluide d'un canal (4) à un autre.    Mold according to one of Claims 1 to 6,
    characterized in that the channel walls are provided with fluid circulation openings (5) from one channel (4) to another.         Moule selon l'une des revendications 4 à 7,
    caractérisé en ce qu'au moins une partie des canaux (4) est compartimentée par l'intermédiaire d'une cloison (6) rapportée, lesdits canaux (4) comportant, au niveau de leur paroi débouchant dans la face (3) d'appui du bloc, des encoches, ces encoches formant, à l'état fermé du bloc au moyen d'une paroi pleine rapportée destinée à constituer la paroi d'appui de la presse, les ouvertures (5) de circulation de fluide d'un canal (4) à un autre, de manière à imposer une circulation forcée du flux de fluide le long des parois desdits canaux (4) compartimentés.    Mold according to one of claims 4 to 7,
    characterized in that at least a part of the channels (4) is compartmentalized by means of a partition (6) attached, said channels (4) having, at their wall opening into the face (3) of support of the block, notches, these notches forming, in the closed state of the block by means of a solid insert wall intended to constitute the support wall of the press, the openings (5) of fluid circulation of a channel (4) to another, so as to impose a forced circulation of the fluid flow along the walls of said channels (4) compartmentalized.         Moule selon l'une des revendications 1 à 8,
    caractérisé en ce que les extrémités des canaux (4) en arrière de la face de moulage sont positionnés le long d'une ligne de tracé identique au profil de la face (2) de moulage du moule.    Mold according to one of claims 1 to 8,
    characterized in that the ends of the channels (4) behind the molding face are positioned along a trace line identical to the profile of the molding face (2) of the mold.         Moule selon l'une des revendications 1 à 9,
    caractérisé en ce que la face (3) d'appui d'au moins une partie (1) de moule est conformée pour délimiter un logement servant à la réception d'un bloc d'éjecteurs.    Mold according to one of Claims 1 to 9,
    characterized in that the bearing face (3) of at least one mold portion (1) is shaped to define a housing for receiving an ejector block.
    EP04291855A 2003-07-22 2004-07-21 Large metal mould Withdrawn EP1500445A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0308906 2003-07-22
    FR0308906A FR2857890B1 (en) 2003-07-22 2003-07-22 LARGE SIZE METAL MOLD

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    EP1500445A2 true EP1500445A2 (en) 2005-01-26
    EP1500445A3 EP1500445A3 (en) 2007-04-25

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    DE102009008675A1 (en) * 2009-02-12 2010-08-19 Audi Ag Casting mold for die casting a component, comprises a first mold part, which comprises a shape-giving contour element, a backfill supporting the contour element and a tempering unit introduced in the backfill, and a second mold part
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    CN103209787A (en) * 2010-05-18 2013-07-17 乔治·费希尔服务有限责任公司 Die cast part of a die casting mold and corresponding die casting device
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    DE102006008359B4 (en) * 2006-02-21 2008-06-05 Direkt Form Gmbh Temperable tool made of a cast metal material for shaping workpieces
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    CN103209787A (en) * 2010-05-18 2013-07-17 乔治·费希尔服务有限责任公司 Die cast part of a die casting mold and corresponding die casting device
    DE102011111583A1 (en) * 2011-08-20 2013-02-21 Volkswagen Aktiengesellschaft Heatable tool e.g. die-cast metal tool, useful for molding workpieces, comprises a mask imaging contour of workpiece, a base body interconnected with the mask, and tempering cavities for receiving a tempering medium to temper the workpiece
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    DE102012024051A1 (en) * 2012-12-08 2014-06-12 Volkswagen Aktiengesellschaft Pressure casting tool, useful for molding workpiece, comprises ejector element arranged in support part to remove workpiece form mold cavity, and sealing element liquid-tightly sealing moderate temperature cavity relative to aperture
    DE102014001563A1 (en) * 2014-02-05 2015-08-06 Universität Kassel mold
    DE102014001563B4 (en) * 2014-02-05 2015-08-20 Universität Kassel mold
    GB2538557A (en) * 2015-05-22 2016-11-23 Rolls Royce Plc Casting die
    US10124400B2 (en) 2015-05-22 2018-11-13 Rolls-Royce Plc Casting die
    CN106914599B (en) * 2016-12-28 2019-03-08 宁波臻至机械模具有限公司 A kind of clutch housing water cooling flow passage device
    CN106914599A (en) * 2016-12-28 2017-07-04 宁波臻至机械模具有限公司 A kind of clutch housing water-cooled flow passage device
    DE202017106450U1 (en) * 2017-10-25 2018-07-09 Schaufler Tooling Gmbh & Co.Kg Mold with cooling system
    CN111151735A (en) * 2019-11-29 2020-05-15 武汉数字化设计与制造创新中心有限公司 Casting mould
    CN110899671A (en) * 2019-12-09 2020-03-24 马鞍山市黎明天工自动化设备有限公司 Casting solidification control method

    Also Published As

    Publication number Publication date
    EP1500445A3 (en) 2007-04-25
    FR2857890B1 (en) 2006-11-24
    FR2857890A1 (en) 2005-01-28

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